The invention discloses a charging method and device; the method comprises: acquiring information of a target charging pile which includes charging pile identifier and charging pile information that is varying; updating the charging pile information of a charging pile corresponding to the charging pile identifier in an electronic map according to the varying charging pile information so as to obtain a target electronic map; judging whether a request to refresh the charging pile information in a client is received; if yes, updating an electronic map on the client according to the target electronic map. As charging pile information and electronic map are calculated from a server, the process of a map APP refreshing the charging pile information never jams in case that many charging piles arepresent.